Electrical heating apparatus.



G. D. BABUOCK. ELECTRICAL HEATING APPARATUS. APPLICATION FILED JULY 24,1907.

Patented Dec. 15, 1908 2 SHEETSSHEET 1.

C.'D.- BABGOOK. ELECTRICAL HEATING APPARATUS. APPLICATION FILED JULY 24,1907.

906, 990, Patented Dec; 15, 1908 2 SHEETS-SHEET 2.

j!!! W Z/// I To all whom 'it may concern:

UNITED srArgn-s PATENT OFFICE.

CLIFFORD 1).

BABOOGK, OF NEW YORK, N. Y., ASSIGNOR TO UNITED WIRELESS TELEGRAPHCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF MAINE.

ELECTRICAL HEATING APPARATUS.

Specification of Letters Patent.

Patented Dec. 15, 1908.

Application filed July 24, 1907. Serial 110.385 ,260.

. Be it known that I, CLIFFORD D. BABGOOK, a citizen of theUnitedStates, anda resident of New York, in the county of New York andState of New York, have invented a new and useful Improvement inElectrical Heating Apparatus, of which the following is a specification.

My invention relates to electrical heating apparatus and more especiallyto ap aratus for heating and melting waxes, para s, and insulatingcompounds of inflammable nature,

although, as will be obvious, my inventionma be used for many otherpurposes.

- he object of my invention is to produce an electrical heatingapparatusby means of which'the development of heat may be easily controlled and asaving of electricalenergy eliected by varying in the manner hereinaftermore fully describedthe effective number of heating units or groupsthereof.

With this object in view my invention comprises ,a vessel which may bepivotally supported in a standard and in which are mounted a pluralityof heatingunits, such as resistance coils, so constructed and arrangedthat any one of said heating units or groupsthereof may be independentlyconnected with a source of electrical energy and when so connected, theamount of current flowing therethrough regulated and adjusted to suitexisting conditions.

My invention also comprises the novel arrangement and combination of 7arts hereinafter described and set forth in t e appended claims.

In the drawings which accom any and form a part of the present spec'cation, '1 have illustrated one embodiment of my invention which hasgiven good results in practice, although it will be understood that I donot limit myselfto said particular embodi ment inasmuch as manymodifications may be made therein without departing'from the principleofmy invention. I

In the drawings, Figure 1 represents a central vertical section of anelectrical heating apparatus constructed in accordance with the presentinvention. Fig. 2 is a perspective.

View of the insulating supporting-member for the heating units. Fig. 3is a diagram showing one arrangement of circuits that ma be employed.apparatus shown in Fig. 1, supported in a standard.

Fig. 4 is a front elevation oi the.

in the figures, 1 represents a vessel of any suitable'material adaptedto receive the substance to be melted, in that particular em bodimentof,the invention hereindescribed. 2 1s a casing 'for said vessel, and 3represents a packin of sand, mineral wool, or other heat insu atingmaterial. The casing 2 may be provided with trunnions 9, 9, so thattheapparatus" may, be ivoted in a suitable standard 10, 11, as s own inFig. 4, for the purpose of more easily emptying the vessel 1 ofitsmolten contents. 7

Mounted in the vessel are the vertically disposed insulating ,membersy 4of lavite, unglazed porcelain, or any other substance which isinsulating and noninflammable.

The said members 4 are shown herein as secured to the rings 7 and 8 andthe horizon-- tally disposed members 6, 6, also ofinsulating-materialmay be secured to the lower ring 7, so that When the supporting memberformed by said rings and members 4, 6, is mounted in the casing 1,'themembers 6, 6, will be near thebottomof said casing It will be understoodhowever that any other suitable arrangementof means for supporting theheating units may be employe A number ot heating units or groupsthereof, A, B, C, D, herein shown as resistance coils, may be supportedby the vertically arranged members 4, and one or more heating units orcoils E E may be supported by the horizontally arranged members 6. Whenthe vessel is only partly filled with a substance to bemelted, as forexample, an

insulatingcompound, it is desirable to cut out of circuitgthoseresistance units in the upper portion of the heating apparatus, for thepurpose of saving electrical energy. Onepco'nvenient arrangement foreffecting this result is shown in diagram in Fig. 3, in

which the four groups of heating c0ils,-A, B,

O, and D, each group consisting, as shown,

of four heating units, are laced in parallel circuits, each of, whichinc udes a switch, S, S, S, S For the purpose of independently varyingthe current flow through each heating unit, or group thereof, each oneof said parallel circuits may contain a rheostat R, RQR, 'R, havingadjustable contact members 7c, 7r, kf, lc, respectively. The saidparallel circuits are provided with connections 5 5 to the binding postsa b, to which connect the poles of the generator G or other suitablesource of electrical energy. These connections may include the switchesand material the vessel does not reach the the rheostat R having anadjustable contact It, said rheostat simultaneously controlling the flowof current to all the coils or '5 groups of coils that may be connectedin circuit. The horizontally arranged windings E may be connected withthe binding osts a, b by the wires i, h, which may inc udc the switch S"and the rheostat R having the adjustable contact is".

Although the circuit controlling arrange ments above described may beassociated with the heating apparatus in any suitable manner, I find itconvenient, with the ticular form herein disclosed in which theapparatus is pivotally attached to a stationary member, to attach thecircuit controllers to the outside of said casing 2 in the manner shownin Fi 4, in which the letters of reference are identical with thoseemployed in Fig; 3. The connections 0, d, e, f, g from the switches tothe heating coils may be arranged as shown in Fig. 4 along the toportion "of the vessel 2, each said con uctor passing into said vesseland makin conneclfiion with its respective coil, as in 'cated in ig. 3.

I-claim:

1. In an apparatus for heating insulating groups of heating unitslocated one above the other in said vessel; and means whereby sc rgibyhv f In an apparatus for'heating-insulating com ounds, the combination ofa vessel for holding said. compounds; a plurality of bare uninsulatedcoils. arranged one above the other in saidvessel; a frame of insulatingmaterial carrying said coils;and means for cutting out the uppermostcoils when the material to be heated does not sufiiciently fill thevessel to reach the same, substantially as described.

4. In an apparatus for heating insulating compounds, the combination ofa vessel for holding said compounds, a casing provided with trunnionsfor holding said vessel; a suitable support in which said trunnionspivot; a source of electrical energy; a plurality of groups ofhcatingunits arranged one above the other in said vessel; and means for cuttingout the uppermost units when the with 'trunnions for holding saidvessel; heat par-i com ounds, the combination of a vessel for holdingsaid compounds; a plurality of same, substantially as described.

5. In an apparatus for heating insulating compounds, the combination ofa vessel for holding said compounds; a casing provided insulating meansbetween said casing and vessel; a suitable support inwhich saidtrunnions pivot; a source of electrical energy; a plurality of groups ofheatingunits arranged one above the other said vessel; a suitableinsulating frame on which said units are mounted; and means for .cuttingout the uppermost units when the material in the vessel does not reachthe same, substantially as described.' v 6. In an apparatusior heatinginsulating compounds, the combination of a vessel for holding saidcompounds; a casing provided with trunnions for holding said vessel;heat insulating meansbetween said casing and vessel; a suitable supportin which saidtrunnions pivot; a source of electrical energy; a

plurality of groups of heating units arranged one above the other insaid vessel; a suitable insulating frame on which said units aremountedv consisting of the vertical members 4, 4,-and the horizontalrings 7 and 8; and means for cutting out the uppermost units when thematerial in the vessel doesnot reach the same, substantially asdescribed.

7. an apparatus for heating insulating compounds, thecombination of avessel to hold said compounds; a plurality of heating units located insaid vessel one above the other; a plurality of parallel circuits inwhich said units are included; a switch and a rheostat in. each circuit;a source of electrical energy; connections from said parallel circuitsto said source; and a switch and-rheostat in said connections, the wholebeing soarranged that the uppermost units may be cut out whenthevmaterial inthe vessel does not reach, the same, substantiallyv asdescribed. v i.

8. In an apparatus for heating insulating compounds, the combination ofa pivoted vessel to hold the same; a plurality of heating units arrangedone above, the other in said vessel; and means mounted on thepivotedvessel for cuttingxout' the uppermost units when the materia-ldoes not reach the same, substantially as described.

9. In an apparatus for heating insulating compounds, the combination ofa pivoted vessel tohold the same; a plurality of bare, uninsulatedheating I units arranged one above the otherin said vessel; a frameofinsulating material on which said units 'are mounted; and meansmountedon the pivot-w ed vessel for cutting out the uppermosteunits when thematerial does not reach the same, substantially as described. n .1;

10. .ln an apparatus for-heating insulating said vessel heat insuietingmaterial Between 5 s'aid vessel and easing; a phnretityof bare, eumnsulated heatlng umts e-fienged one abo'v'e the other in said Vessel;frame of insulating material on which said uni-ts are mounted; and meansmounted on the pivoted vessel for c'u'tting out the uppermost units whenthe material does not reach the some, sufbstantiallyqzs described.

11. In all-apparatus for heating insole ting eompounds, the combinationof a pivoted vessel to hold the some; a, plurality of heat- .5 coilsarranged one above the other in said vessel; it suitable frame 0:1,Whiohsaid.

coils are mounted; and a switch and rheostat fol" each @011 mounted onthe vessel whereby the omrrent through each coil may be com tzoiied andthose soils with Whi :1 the materietcloes not Contact may be out out,substme tielly as described.

In testimony Whemof, I have hereunto subscribed my name this 2nd day ofJuly 1987.

